I think this is what you are looking for. That's the cheapest place I've found.
http://maryjos.com/notions/notions-s...king-cloth-753
I'll tell you my little story about this grid canvas...I wanted one so badly but thought it
was too expensive (on other websites) so hold off for a while. Then I went to visit
my mother who we always blame of hoarding everything. Well, I found that blocking
cloth that my sister's friend gave me some 27 years ago. I just could not believe it was
still there and in perfect shape. It crossed the Pacific Ocean twice. LOL